Blind fixes for warnings in wxTinderbox.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@37168 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/univ/combobox.h

@@ -66,6 +66,7 @@ class WXDLLEXPORT wxComboPopup
 {
 public:
     wxComboPopup(wxComboControl *combo) { m_combo = combo; }
+    virtual ~wxComboPopup() {}
 
     // we must have an associated control which is subclassed by the combobox
     virtual wxControl *GetControl() = 0;

include/wx/univ/inpcons.h

@@ -39,6 +39,7 @@ class WXDLLEXPORT wxInputConsumer
 {
 public:
     wxInputConsumer() { m_inputHandler = NULL; }
+    virtual ~wxInputConsumer() {}
 
     // get the input handler
     wxInputHandler *GetInputHandler() const { return m_inputHandler; }

include/wx/univ/scrarrow.h

@@ -81,6 +81,8 @@ private:
 class WXDLLEXPORT wxControlWithArrows
 {
 public:
+    virtual ~wxControlWithArrows() {}
+
     // get the renderer to use for drawing the arrows
     virtual wxRenderer *GetRenderer() const = 0;
 

include/wx/univ/scrthumb.h

@@ -86,6 +86,8 @@ private:
 class WXDLLEXPORT wxControlWithThumb
 {
 public:
+    virtual ~wxControlWithThumb() {}
+
     // simple accessors
     // ----------------